Fuel duel as MLA's diesel bill sparks more questions

The Northern Territory Opposition says the Member for Arnhem's comments on her government fuel card bill raise more questions than they answer.

The parliamentary Speaker last week revealed details of Larisa Lee's $14,000 worth of fuel card spending from September 10 to March 29.

Ms Lee responded by saying she'd actually spent more than $17,000, that she, her husband and her electorate officer had used the fuel, and that she'd done nothing wrong.

The Opposition's Michael Gunner says the spend is outrageous.

"Seventeen thousand dollars of tax-payers money on fuel in six months is ridiculous ... these figures do not add up," Mr Gunner said.

"The CLP Chief Minister Adam Giles needs to stand Larisa Lee down and have an independent investigation into the very serious questions that have been raised."

Labor wants the Chief Minister to ask the Auditor-General to investigate the her fuel card spending.

The fuel duel was initially sparked last month, when the parliamentary Speaker revealed in Estimates hearings that Ms Lee had spent more than double that of any other politician on fuel in the same period.

The Speaker also reminded every MLA again that their fuel card was only for use with their government cars.

The Chief Minister says the Speaker can deal with the matter.

But Mr Gunner says the Auditor-General should investigate.

"While that investigation is continuing, Madam Speaker could take back the car and the fuel card until we can work out what is going on and how this fuel is being spent."